Decades before BBS, Xehanort had a daughter, Yuki. Somehow, she was transported to the future to Eos (FFXV world). After Dawn of the Future (alt ending), the Heartless attacked sending Yuki, Cor, and Lunafreya to Traverse Town. Inspired by A Trail of Memories series by animechick247 and Forget Me Not by WingBladeWeaver1357. Spoilers for FFXV. Maybe Riku/OC eventually